请问作者这个支持DB2数据库？

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该 issue 未提供文件、测试或入口点，只询问是否支持 DB2。首先检查仓库现有的关系型数据库支持和文档；完成条件是确定并清晰记录 DB2 的支持状态，或定义缺失的实现范围。

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